Constructed wetland sewage purification system based on external electricity production and internal confluence water flow

Abstract

The invention discloses a constructed wetland sewage purification system based on external electricity production and internal confluence water flow. The system comprises a double-layer pool, a waterinlet pipe, a porous water distribution pipe, a porous water collection pipe, a rotatable elbow, a U-shaped drain pipe and aquatic plants, wherein the double-layer pool comprises an electricity non-production inner layer and an electricity production outer layer. Sewage enters the bottom of the electricity production outer layer firstly, and organic pollutants in the sewage are degraded by electricigens and release electrons; water flows upwards to the top of the electricity production outer layer, and nitrification and denitrification for nitrogen removal are performed. Water flow converges to the center and enters the inner layer area, the inclination degree of the U-shaped drain pipe is changed by adjusting the rotatable elbow, reoxygenation is accelerated, and pollutants such as phosphorus and the like in water are further removed under actions of filtration, adsorption, coprecipitation and the like. The microbial fuel cell technology is tightly combined with traditional constructed wetlands, and efficient organic carbon metabolism, microbial denitrogenation and adsorption coprecipitation based phosphorus removal are compactly controlled in one constructed wetland.

Description

technical field [0001] The invention belongs to the field of sewage treatment, and in particular relates to a sewage purification system of an externally generated electricity and internally collected water flow artificial wetland. Background technique [0002] With the rapid development of social economy, my country's water environment situation is becoming increasingly severe. Many problems caused by water pollution are worrisome, and various places have successively carried out the remediation work of polluted water bodies. Under such circumstances, urban point source pollution control has achieved certain results, but in the vast rural areas, the problem of water pollution has become more prominent. Rural sewage treatment has become the top priority of the current water environment. [0003] Rural pollution has the characteristics of large volume and wide area, dispersion, and spatial heterogeneity. In addition, the rural pollution control and operation and maintenance...

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Problems solved by technology

[0006] The purpose of this invention is to provide a sewage purification system for constructed wetlands with external power generation and internal sinking water flow in order to solve the problems that the existing constructed wetland technology is not compact in structure and occupies a large scale

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